Loose-leaf binder



July 12, `V1932. F. L. IMPEY LOOSE LEAF BINDER Filed Nov. 1l, 1930 2Sheets-Sheet l l wily l Figi# @QQ a/@m im my@ July l2, 1932. I F. L..IMPEY LOOSE LEAF BINDER 2 Sheets-Sheet 2 Filed Nov. 11'. 1930 PatentedJuly 12, 1932 Latine FRANCIS LEVI'IT' IMPEY, OF NORTHFIELD, ENGLAND,.ASSIGNO-R 'IG i M'ORIAND & IIVIPEY LIMITED, OF BIRMINGHAM ENGLANDLOOSE-LEAF BINDER Application led November 11, 1930, Serial No. 494,939,and in Great Britain Aprily 12, 1930.

This invention relates to loose leaf binders, and particularly bindersin which thc leaves are arranged in an overlapping or stepped formation,so that all of a number of sheets are in part visible simultaneously,and in which the leaves are correlated by means of posts passing throughholes in the leaves.

One example of a loose leaf binder to which the present invention isadapted is described and illustrated in my Patent No. 1,841,894, datedJanuary 19, 1932.

The principal object of the present invention is to provide an improvedconstruction of the posts.

The invention comprises the combination of a plurality of hollow taperedposts each of which is flanged at one end, and a pair of strips (one ofwhich may be a leaf supporting sheet) between which the flanged ends ofthe posts are secured. Also the invention comprises the combination withsome of the posts of compensating pieces as hereinafter described.

In the two accompanying sheets of eX- planatory drawings Figure 1 is apart section plan and Figure 2 a rear view of a loose leaf book providedwith this invention.

Figure 3 is a longitudinal section and Figure 4L a transverse section ofa portion of a leaf supporting sheet having attached thereto postsconstructed in accordance with this invention. Figures 5 and 6 arerespectively the rear elevation and the end elevation of a portion of asupporting leaf provided with posts and strips as aforesaid and alsowith a spacing piece.

Figure 7 is a plan of one side and Figure S a plan of the other side ofthe portion of the leaf supporting sheet shown in Figures 5 and 6.

In carrying the invention into effect as shown7 each hollow post a ismade from thin sheet metal or tubing, and is of tapered form, allowingcorresponding posts in an assembly of leaves to be nested together. Eachpost may be open at both ends, or as shown it may be open at one end andclosed at the other. The base of each post is formed with an externalflange b, and the posts in each row are secured atV the requireddistance apart by a pair of strips c, d, whichy grip the flanges betweenthem, the posts being arranged to project through holes in oneror bothof the'y strips. One of the strips c may consist of a narrow piece ofthin metal, and the other d may consist of a sheet of thin cardboard orstiff paper on which the leaves are supported- The metal strip issecured to the other by' tongue pieces e onthe metal strip arrangedlioto grip the supporting sheet; one row;Y of? tongue pieces passes throughholes f in-f the supporting sheet and are bent over thel um derside ofthe sheet, while the other row: grips the rear edge of the sheet, asshown iin Figo5 ures 7 and 8. In this construction I prefer to formtongue pieces g on the flange of each post, which tongue pieces can bepressed through the paper sheet d andbent over to secure the post.

In one application of the invention a supporting sheet with postsattached as above described is used for supporting a number of leaves h,and different groups of leaves with intermediate supporting sheets canbe superimposed, the projecting parts of the posts in each group beingcaused to enter theV hollow interiors of the corresponding posts* in theadjacent group. The posts associated with each sheet Z are arranged toproject al- 80 ternately at opposite sides of the sheet, and preferablyone set of posts is provided with more pointed outer ends than the otherto facilitate entry into the hollow interiors of the posts having bluntends. rIhe dierences g5 in the configuration of the posts is clearlyshown in, for example, Figures 3 to 6.

By this invention the posts required for the location of the leavescanbe provided in a very simple and convenient manner.

When the posts are used lfor holding in proper relationship a group ofoverlapping sheets as aforesaid and as shown in Figure 2, the thicknessof the group at its upper and lower edge is less than atthe center aswill be seen at Figure 2, and to compensate for this inequality ofthickness, so as to make the spacing between each pair of supportingsheets as uniform as possible, the supporting sheets al are sometimesembossed near their upper A and lower parts or are provided withseparate compensating pieces. According to one part of my presentinvention I also provide compensation pieces z' in combination with theends of the strips c which carry the posts. These compensating piecesmay take a variety of forms. In one convenient form as shown I attach tothe rear edge of the underside of the supporting sheet at each end ashort metal strip z' of channel section the outer Y surface of whichstands above the surface of the supporting sheetsuiciently to afford therequired compensation. The edges of this compensating piece are securedby the tongue pieces e which clamp the metal retaining strip to thesupporting sheet, and the compensating piece is perforated. yto allow apost or posts to project through it. Y

In the Y example illustrated groups of leaves as aboveV described aresecured bef tween clamping bars 7c provided with posts Z 'which passthrough holes m in the members carrying the parts a.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is l. In loose leaf binders, the combination ofa leaf-supporting sheet, a, plurality of Y hollow tapered posts, aflange formed integrally with the larger end of each post, a perforatedstrip disposed along one edge of andfadapted to cooperate with thesupporting sheet for securing the posts, the flanged ends of the postsbeing interposed between said strip and said sheet, andv tongue piecesformed integrally with eachA longitudinal edge of the strip, one row oftongue pieces being engaged with one edge of the supporting sheet andthe other'set being in serted through perforations and'engaging theedges defining said perforations inthe supporting sheet, for securingtogether the strip, the vlianged posts and the supporting sheet,substantially as described. Y

2. In loose leaf binders, the combination of a leaf-supporting sheet,a'plurality of hollow tapered posts, a. flange formed integrally withthe larger end of each post,V tongue pieces on the post flange adaptedto engage the supporting sheet, a perforated strip disposed along oneedge of and adapted to cooperate with thesupporting sheet for securingthe posts, the hanged ends of the posts being interposed between saidstrip and said sheet, and tongue pieces formed integrally with eachlongitudinal edge of the strip, one row-of tongue pieces being engagedwith one edge of the supporting sheet and the other set'being insertedthrough per- .Y forations and engaging the edges defining saidperforations in the supporting sheet, for securing together the strip,the flanged posts and the supporting sheet, substantially asl described.

. i 3Inloose leaf binders, the combination of a leaf-supporting sheet, aplurality of hollow tapered posts, a flange formed at the larger end ofeach post, a perforated strip disposed along one edge of land adapted toco-operate with the flanges on the posts for securing the posts to thesupporting sheet, the ianged ends of the posts being interposed betweensaid strip and said sheet, said posts being adapted to receive leavesarranged 'on the supporting sheet in stepped formation, and compensatingpieces associated with the posts at the upperand lower edges of thesupporting sheet, the depth of each compensating piece beingapproximately equal to the thickness of. the group of leaves placed onthe supporting sheet, substantially as described. l'

In testimony whereof I have signed my name to thisspecifcation.

` FRANCIS LEVIT-T IMPEY.v

